He said this is one of the most heinous attacks in the history of Texas. The suspected shooter had been identified as 17-year-old Dimitrios Pagourtzis, a student at the school. The governor said the suspect used a shotgun and a revolver in the attack. Both of these weapons were obtained by the shooter from his father, who legally owned them. A number of explosive devices were also used. The shooter has been arrested and charged with murder. US President Trump extended his condolences to the victim’s families, saying his administration was “determined to do everything in their power” to prevent such incidents.